<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>focus伪类选择器</title>
    <style>
      /* 把获得焦点(光标)的input表单元素选取出来 */
      input:focus {
        background-color: pink;
        color: red;
      }
    </style>
  </head>

  <body>
    <input type="text" />
    <input type="text" />
    <input type="text" />
  </body>
</html>
